Since #39229 the commit page header dereferences
`.Verification.CommittingUser` when the committer is not the author.
`Verification` is `nil` for unsigned commits (see `repo.Diff`), so
opening such a commit — a rebased or cherry-picked one, for example —
logs a template error and the page comes out truncated:
```
Render failed: failed to render template: repo/commit_page, error: template error: builtin(bindata):repo/commit_page:138:22 : executing "repo/commit_page" at <.Verification.CommittingUser>: nil pointer evaluating interface {}.CommittingUser
```
This guards the access and adds an integration test that creates a
commit with distinct author and committer identities and checks the page
renders completely (the status stays 200 on a mid-render failure, so the
test looks at the body).
_The fix was worked out with help from an AI assistant; I reviewed and
tested it myself._
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This PR adjusts the repository README discovery logic to mirror GitHub's
priority order, while retaining support for Gitea's specific `.gitea/`
directory.
Previously, Gitea would prioritize a `README.md` at the root of the
repository over any READMEs in `.gitea/` or `.github/`. With this
change, well-known subdirectories are evaluated first when viewing the
repository root.
**New Priority Order:**
1. `.gitea/README.md`
2. `.github/README.md`
3. `/README.md` (root directory)
4. `docs/README.md`
This allows repository maintainers to use `.github/README.md` (or
`.gitea/README.md`) as the repository homepage without having to remove
or rename generic root `/README.md` files required by package managers
(like NPM, Crates.io, Docker, etc.).
---------
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
